I've just started finally reading this series and have the first two TPBs. I'm thoroughly hooked and I see there is a ton of of various GFT titles that have been done and also currently going. I have no idea how to proceed collecting and reading this series and am worried that I'll buy something I won't understand because I didn't read some previous thing.
I haven't been able to find any kind of reading list for the series. Can I just keep collecting the main series and it will tell me what side stuff to read next? I'm overwhelmed by it all.